I used the Orchid mix 70% perlite 20% peatmoss 10%...
I like the (pure blend((organic))liquidKarma) idea too...I use this for veggies...
and the soil mix with blood meal I used my 1st soil grow, back in the day

an OG recipe I modified slightly was per 10lb bag/soil, 8 cupspeat, 8c perlite,1/2c bone meal, 1/2c blood meal, 2 tbs pulverized dolomitic lime (ph), just water.

soil/perlite...50/50...

just 2-3 I could think of; Off the top of my head goodluck